若A={0，1，2，3}，B={x|x=3a，a∈A}，则A∩B=（ ）[ ]
A.{1，2}
B.{1，0}
C.{0，3}
D.{3}
答案：C
It’s easy me English. I like it.
A．for, to learn
B．for, learning
C．of , to learn
D．of , learning.
胃溶薄膜衣材料( )。
A．CAB．HPMCC．PVPPD．HPMCASE．PVP
